Rx550 update
Finally got time to play around with an Rx550 2GB. We were missing a device string, so the miner didn't recognize the gpu and failed in the early initialization. It's now fixed, I managed to squeeze out ~428 h/s using 2+2 with 1150/900 cclk, 1875/900 mclk as shown below. Please note that I have zero experience with the Rx550, so I just went with some values.
We will be releasing an updated version tonight with support for Rx550.
Team Red Miner version 0.3.5
[2018-10-31 14:41:37] Auto-detected AMD OpenCL platform 0
[2018-10-31 14:41:38] Initializing GPU 0.
[2018-10-31 14:41:38] Pool pool.supportxmr.com login succeeded.
[2018-10-31 14:41:38] Pool pool.supportxmr.com received new job. (job_id: qLzw6pc0GxZqslZBlOyKg/VrvvS0)
[2018-10-31 14:41:38] Pool pool.supportxmr.com set difficulty to 10000
[2018-10-31 14:41:38] Dev pool connected and ready.
[2018-10-31 14:41:39] Successfully initialized GPU 0: Polaris with 8 CU (PCIe 04:00.0) (CN 2+2)
[2018-10-31 14:41:47] Pool pool.supportxmr.com share accepted. (GPU0) (1/1/0)
[2018-10-31 14:42:03] Pool pool.supportxmr.com share accepted. (GPU0) (2/2/0)
[2018-10-31 14:42:08] Stats GPU 0 - cnv8: 406.3 h/s, avg 420.7 h/s, pool 699.3 h/s 2/0
[2018-10-31 14:42:18] Pool pool.supportxmr.com share accepted. (GPU0) (3/3/0)
[2018-10-31 14:42:21] Pool pool.supportxmr.com share accepted. (GPU0) (4/4/0)
[2018-10-31 14:42:38] Stats GPU 0 - cnv8: 427.2 h/s, avg 423.7 h/s, pool 682.6 h/s 4/0
[2018-10-31 14:42:55] Pool pool.supportxmr.com share accepted. (GPU0) (5/5/0)
[2018-10-31 14:43:02] Pool pool.supportxmr.com share accepted. (GPU0) (6/6/0)
[2018-10-31 14:43:08] Stats GPU 0 - cnv8: 429.2 h/s, avg 424.7 h/s, pool 677.2 h/s 6/0
^C